javascript中等于(==)与全等(===)的区别说明
等于(==)的情况下 只要值相同就返回True。而全等(===)的时候需要值和类型都要匹配才能返回True.
<script type="text/javascript">
function ff(){
var y = 5;
if(y == "5"){
document.write("1== '5' True ");
}
else{
document.write("== '5' False ");
}
if(y == 5){
document.write("12== 5 数字 is True ");
}
else{
document.write("== 5 数字 False ");
}
if( y === 5){
document.write("13=== 数字5 is True ");
}
else{
document.write("=== 数字5 False ");
}
if(y === "5"){
document.write("=== 5 is True ");
}
else{
document.write("14=== 5 is False");
}
}
</script>
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